code: def setup():
      """
      Initialize global variables for the demos.
      """
      global USERIDS, FIELDS
  
      USERIDS = [
          "759251",
          "612473",
          "15108702",
          "6017542",
          "2673523800",
      ]
      # UserIDs corresponding to\
      #           @CNN,    @BBCNews, @ReutersLive, @BreakingNews, @AJELive
      FIELDS = ["id_str"]
  
file_path: nltk/nltk/twitter/twitter_demo.py
imports: import datetime
  import json
  from functools import wraps
  from io import StringIO
  from nltk.twitter import Query, Streamer, TweetViewer, TweetWriter, Twitter, credsfromfile
label_desc: Use image node_id 3 for calling a global function with example usage: setup() without return types